JP2006183431A - Soil block with both water retainability and water permeability - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a block which is composed of an inorganic material mixture which is superior both in water retainability and water permeability, has relatively small specific gravity and proper toughness, can be collapsed relatively easily after being used up, does not cause a waste disposal problem, is returned to the soil easily, and suppresses an increase in manufacturing cost. <P>SOLUTION: The soil block is a mixture of pit sand of 15 to 60 wt%, molten slug of 10 to 35 wt%, Portland cement of 5 to 15%, recycled expanded glass of 20 to 30%, and an additive such as a nonionic surface active agent and pigment. The soil block has both water retainability and water permeability. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a block body that is excellent in water retention and water permeability, is lightweight, can be disintegrated relatively easily after use, and can be returned to soil.

In general, blocks used for pavements and the like are robust because they require a certain level of strength, but they are heavy, and often become difficult to process as waste after being warped. .
Therefore, the present invention relates to a block that is lightweight and can be recycled in the treatment as waste, and forms a soil block from mountain sand or the like as its component.
By the way, as an example using this mountain sand or the like, there is Patent Document 1 relating to a conventional outfitting structure, and the outline thereof is to make a surface layer by mixing earth-based outfitting material, fly ash and cement.
However, as in the conventional case, the outfitting material also becomes heavy due to the strong binding force of cement and is difficult to dispose of after use.
JP 2002-275814 A

The present invention has been made in view of the above circumstances. The composition mixture is (1) excellent in water retention and water permeability, (2) is an inorganic material having a relatively small specific gravity and suitable toughness. The present invention provides a block body that can be easily disintegrated later and that is easy to return to the soil without causing a problem of waste and that can suppress the manufacturing cost.

In order to achieve the above-mentioned object, the soil block according to claim 1 is composed of mountain sand 50 to 70% by weight ratio, Portland cement 5 to 15%, recycled foamed glass 20 to 30%, nonionic surfactant and pigment, etc. It is characterized by having both water retention and water permeability by mixing these additives.

  The soil block according to claim 2 is 15-60% pile sand by weight ratio, 10-35 molten slag, 5-15% Portland cement, 20-30% recycled foamed glass, nonionic surfactants, pigments, etc. It is characterized by mixing the agent and having both water retention and water permeability.

Since the soil block of the present invention is mixed with portland cement, recycled foamed glass and nonionic surfactant in mountain sand, it is excellent in water permeability and water retention, and can reduce the weight and water retention of the block body. Furthermore, the surface hardness can be increased by adding molten slag.
Further, since the specific gravity of the soil block is 1.1 to 1.3 g / cm ³ and the bending strength is about ³ to 4 MPa, it is lightweight and can be easily pulverized and constitutes the soil block. Is a mineral and surfactant, so it does not cause waste problems.

An embodiment of the present invention will be described with reference to FIGS. 1, 2, 3 and Table 1. FIG.
The present invention is integrated as an inorganic composition that has both water retention and water permeability. The composition of the composition is mountain sand, molten slag, recycled foam glass, Portland cement, additives such as nonionic surfactants and pigments. Consists of.
Hereinafter, after describing the characteristics of the material, the block 1 made of the material will be described.

Mountain sand is an aggregate made of weathered granite, excluding volcanic ash and other clays. The particle size is usually 2 mm or less, and FIG. 1 schematically shows an enlarged example of the particle size distribution state. This figure shows that a having a coarse particle size (2 to 0.5 mm), b having a fine particle size (0.5 to 0.075 mm), and c having a fine particle size (less than 0.075 mm). It is evenly distributed, and it is shown that slight voids d are randomly formed between the particles, indicating that air and water can be stored in a porous shape. In order to increase the water permeability, it is necessary to increase the aggregate having a small uniformity coefficient and a uniform and coarse particle diameter. However, since the cost is high, the water permeability is secured by providing a particle size distribution.

Portland cement substantially surrounds the surface of mountain sand and binds the particles of mountain sand to form a number of voids. Portland cement also solidifies sand and sand and plays a role of holding the block 1 in a porous shape. However, although Portland cement can maintain a large bonding force between aggregates, it is easy to form a dumpling or a lump and easily fills voids, so a small amount is desirable.

Nonionic surfactants have the property of increasing the wettability of mountain sand, uniformly dispersing Portland cement on the surface of mountain sand, and suppressing the surface tension of water to enable uniform water retention and water permeability. When Portland cement is uniformly dispersed on the surface of mountain sand, moderate strength appears as a block body. On the other hand, if the Portland cement is uneven on the surface of mountain sand, it becomes unsuitable because it becomes dumplings or lumps, and the strength becomes too strong, making it difficult to crush.
Nonionic surfactants responsible for improving the wettability and dispersibility of the compounding agent are nonylphenyl ether polymers such as saturides manufactured by DEBCO.PTY.LIMITED, Australia. ~ 7 can be used.

Recycled foam glass is a material that pulverizes waste glass, adds additives, mixes them, puts the mixture in a firing furnace and heats it to a temperature above the glass softening point, and increases the weight and water retention of the block body. It is. In other words, recycled foam glass is a lightweight water-holding ceramic itself, contains a large amount of crucible-like pores, has rapid and strong water absorption, and moderate evaporation. And increase water retention.

Molten slag is a vitreous solidified product produced by melting incineration ash at a high temperature of 1400 ° C in a blast furnace, and the specific gravity is the same as mountain sand, but the hardness is high, and instead of mountain sand, a certain ratio is obtained. When mixed, the surface hardness of the block body after curing can be increased and the wear resistance can be improved.

  Based on the characteristics of each material described above, the composition and molding method of the block 1 having both water retention and water permeability according to the present invention will be described.

Table 1 shows a blending table containing the above materials. Block 1 is formed by dripping and kneading water into a composition mixture containing mountain sand 50 to 70%, recycled foam glass 20 to 30%, Portland cement 5 to 15%, additives such as nonionic surfactants and pigments. To do.

Based on the said mixing | blending, the manufacturing method integrated as a block body of an inorganic composition is demonstrated below.
As shown in FIG. 2, when water is added to the composition mixture, the mixture is stirred with a stirrer, adjusted to block 1, pressed, and cured for 2 days. The block 1 spontaneously solidifies and gradually increases in hardness. FIG. 3 shows the block 1 after solidification.
Recycled foam glass of the compound itself is lightweight and retains water absorption, but it is suitable for natural drying because it has moderate evaporation.
On the other hand, the bending strength of the block body of the present invention is determined by the amount of Portland cement and mountain sand, foam glass, nonionic surfactant, pressure applied by the molding machine, etc., and can be easily crushed with a crusher or the like when the block body is discarded. The amount is preferably 5 to 15 and 20 to 30 g, respectively. If it is this range, the bending strength of this invention block body is securable 3-4MPa.
Further, the composition of the present invention uses a material that can be reduced to natural soil at the time of disposal, and is a block body that can be reduced to natural soil as it is.
As for the physical properties of the block body based on the above formulation, the bending strength is 3 to 4 MPa, and the specific gravity is 1.1 to 1.3 g / cm ³ . Permeability showed 1 × 10 ^{one 4} cm / sec and forth.

Table 2 shows the composition of the following examples.

  In Example 2, the water absorption and the like are the same as in Example 1. However, the molten slag exhibits almost the same properties as mountain sand in specific gravity, and has high hardness. The hardness was increased and the wear resistance was improved.

The present invention is not suitable for a roadway with a heavy load, but can be widely applied to sidewalks, parks, and the like other than that.

FIG. 1 is a schematic diagram of the particle size distribution state of the present invention. Fig. 2 shows the adjustment status of the block body Fig. 3 shows the block body after demolding

Explanation of symbols

a Coarse particle size b Fine particle size c Fine particle size d Cavity A Mountain sand B Cement C Cavity A 'Mountain sand B' Cement C 'Cavity 1 Block body

Claims (2)

Mixing water sand and water permeability by mixing sand sand 50-70%, Portland cement 5-15%, recycled foamed glass 20-30%, and nonionic surfactants and pigments. A featured soil block. Water retention and water permeability by mixing 15-60% mountain sand, molten slag 10-35, Portland cement 5-15%, recycled foam glass 20-30%, and nonionic surfactants and pigments. A soil block characterized by having sex.

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